武汉科技大学ACM ：1001: A + B Problem

Problem Description

Calculate A + B.

Input

Each line will contain two integers A and B. Process to end of file.

Output

For each case, output A + B in one line.

Sample Input

1 1
2 2
3 3

Sample Output

2
4
6

我的代码：

 #include <stdio.h>
 int main()
 {
 int A,B,sum;
 while(scanf("%d%d",&A,&B) != EOF)

 {
 sum=A+B;
 printf("%d\n",sum);
 }
 return ;
 } 

其他代码：

 #include<stdio.h>
 int main()
 {
     int a, b;
     scanf("%d%d", &a, &b);
     printf("%d\n",a + b);
     scanf("%d%d", &a, &b);
     printf("%d\n", a + b);
     scanf("%d%d", &a, &b);
     printf("%d", a + b);
     return ;
 }

 #include <iostream>

 using namespace std;

 int main()
 {
     int a=,b=;
     while(cin>>a>>b)
     {
         cout<<a+b<<endl;

     }

     return ;
 }